Madeleine L'Engle (1918–2007) American writer
The Crosswicks Journal, The Irrational Season (1977)
Context: If our love for each other really is participatory, then all other human relationships nourish it; it is inclusive, never exclusive. If a friendship makes me love Hugh more, then I can trust that friendship. If it thrusts itself between us, then it should be cut out, and quickly.